RU2054075C1 - Nonsplit chairless rail fastening for reinforced concrete underrail support - Google Patents

Abstract

FIELD: railway building. SUBSTANCE: nonsplit chairless rail fastening has embedded member 5 installed in widened portion of through channel 2, clamp 6 with projection on one vertical side, resilient washer 8 for pressing the clamp, all parts being tied up together by common embedded bolt 4. Clamp 6 has additional projection on side adjacent to side with projection. Two vertical sides opposite to above-indicated vertical sides are bevelled in direction of clamp base at angle of 40-85 degrees. Walls of recess 14 have mating bevel. Clamp 6 is installed for turning in horizontal plane and pressing by bevelled sides the feet of different type rails. EFFECT: enlarged operating capabilities. 5 cl, 5 dwg

Description

 The invention relates to a railway track, in particular to its upper structure, fastening elements fixing a rail to a reinforced concrete rail base in a design position.

 In the prior art, a non-lining rail fastening for a reinforced concrete rail base, located in the recess of the latter, consisting of a embedded element installed in the widened part of the through channel for the embedded bolt, a terminal made with a protrusion on one vertical side thereof to press the rail sole and the opposite one on the wall of the recess, and an elastic washer for pressing the terminal, tightened by a common embedded bolt.

 A disadvantage of the known rail fastening is the insufficient resistance to the transverse forces and the forces of the rail theft from the train load due to the design features of the terminal and the notch of the base, in particular the angle of inclination of the plane of their interface. In addition, the well-known rail fastening does not provide for a change in the types of rails within the framework of a single design solution.

 The present invention solves the problem of increasing the resistance to transverse forces and theft forces from train loads and at the same time ensuring the replacement of some types of rails with others within the framework of a single constructive solution.

The solution to this problem is achieved by the fact that in the well-known rail-mounted non-lining rail fastening for reinforced concrete rail base, placed in the recess of the latter, consisting of a embedded element installed in the widened part of the through channel for the embedded bolt, a terminal made with a protrusion on one vertical side thereof for pressing a rail sole, and an opposite recess resting on the wall, and an elastic washer for pressing the terminals tightened by a common embedded bolt, the terminal is made with an additional m protrusion disposed on the side adjacent to the side having the protrusion, and said two opposite vertical sides are chamfered towards the base terminal 40 at an angle ^{of about} -85, with the wall of the recess, which is simply supported on one of the oblique sides terminals configured reciprocal bevel, the terminal is installed with the possibility of its rotation in the horizontal plane and pressing with its protrusions the soles of the interchangeable types of rails, and with their beveled sides, respectively, mating with the beveled recess wall; the fact that the washer for pressing the terminal is made curved, and the bend has a variable relative radius of curvature, which is in the range of 0.004-0.006; the fact that the washer for pressing the terminal is made of polyurethane; the fact that the ratio of the lengths of any two adjacent in terms of the sides of the terminal is in the range of 0.60-1.75; the fact that the terminal is made in the form of a trapezoid in plan, while one of the protrusions for pressing the sole of the rail is made on the smaller side.

 Figure 1 shows the inseparable rail fastening, cross section; figure 2 is the same, a top view; figure 3 terminal, top view; figure 4 section aa in figure 3; in Fig.5 section BB in Fig.3.

The proposed geometric and physical parameters of the proposed design are determined by the following:
a) 40 ^{о the} minimum angle for the perception of the maximum design load from the transverse component of the train load in narrow gauge railway transport;
b) 85 ^{about the} maximum allowable angle corresponding to the technology for the manufacture of sleepers in multi-seat and single-seat forms;
c) the curvature of the curved washer upwards within 1 / 160-1 / 280 is determined calculated on the basis of the maximum allowable speed of movement of rolling stock on access railways ways and maximum permissible axle load;
d) the ratio of the lengths of any two adjacent in terms of the sides of the terminals in the range of 0.60-1.75 is determined by the possible use of various rails P 30 P 75 and permissible contact voltages;
e) the execution of the opposite sides in the form of a trapezoid is determined by the permissible contact stresses on the side face of the rail track and the bottom of the rail at the maximum rated load.

The inseparable unfastened fastening of the rails is mounted in a recess on a reinforced concrete rail base 1 and includes a through channel 2 with a widened part 3, a embedded bolt 4 placed in the channel 2, an embedded element 5 for supporting the widened or bent part of the bolt 4 when it is tightened, terminal 6 for pressing the sole of the rail 7, an elastic washer 8 for pressing the terminal and a nut 9 for fixing the bolt 4 when tightening it. Terminal 6 is provided with two projections 10 and 11, wherein two oppositely disposed projections 12 and vertical walls 13 are tapered toward the terminal base 40 at an angle ^{of about} -85. The wall 14 of the recess on which one of the tapered sides of the terminal 6 is supported is reciprocal bevel. Terminal 6 is installed with the possibility of rotation in the horizontal plane and pressing with its protrusions the soles of the interchangeable types of rails, and with their beveled sides, respectively, mating with the beveled wall 14 of the recess. The washer 8 for pressing the terminal 6 can be made curved, and the bend has a relative radius of curvature (1 / R), which is in the range 1 / 160-1 / 280. Washer 8 can also be made of polyurethane in the form of a flat element. In particular, terminal 6 can be made with a ratio of the lengths of any two adjacent in terms of the sides of the terminal 6 in the range of 0.6-1.75. Terminal 6 can also be made in the form of a trapezoid in plan, while one of the protrusions 10, 11 for pressing the sole of the rail is located on the smaller side of the trapezoid.

 Rail fastening is mounted as follows. The bottom of the rail 7 is installed in the recess on the reinforced concrete rail base 1 through the gasket. The embedded bolt 4 is passed through the washer 8, the terminal hole 6, the embedded washer 5, the nut 9 is threaded onto the bolt thread, after which the embedded bolt 4 is lowered into the through channel 2 of the rail base, moreover, the widened or bent part of the embedded bolt 4 passes into the hole of the embedded element (washer) 5, then rotate the bolt 4 until its widened part contacts the embedded element (washer) 5 and tighten the nut 9. Thus, fected dense preload terminals 6 on the one hand to the base of the rail 7, and on the other to the site under-rail recess and the inclined (tapered) wall 14 that provides the perception of vertical and horizontal components of the operating loads and jacking forces. The above forms of terminal 6 provide increased resistance to transverse forces and theft forces from train loads, as well as the possibility of replacing some types of rails with others having different bearing area. The curved form of the washer 8 for pressing the terminal 6 or its execution of polyurethane, allows for the calculated elastic pressing of the terminal 6 with a minimum consumption of structural material.

 Rail-sleeper grids with the indicated rail fastening options are assembled at track machine stations and stacked by track layers in a known manner, or directly at the place of laying rail-sleeper grids, mainly access roads of industrial vehicles, crane rails of bridge and gantry cranes.

Claims (5)

1. INDIVIDUAL NON-FILLING RAIL BOND FOR REINFORCED CONCRETE UNDERWAY BASE, placed in the recess of the latter, consisting of a embedded bolt installed in the widened part of the through channel in the base, a terminal made with a protrusion on one vertical side to press against the base of the outsole the wall of the recess, and an elastic washer for pressing the terminal, tightened by a common embedded bolt, characterized in that the terminal is made with an additional protrusion located on the side adjacent to thoron having a projection, and two opposing said vertical sides are chamfered towards the base terminals angle of 40 - ^o 85, wherein the recess wall, which simply supported one of the oblique sides terminals configured mating bevel terminal installed with the possibility of rotation in horizontal plane and pressing one of the protrusions of the sole of the interchangeable type of rails, and one of the beveled sides, respectively - the interface with the beveled wall of the recess.  2. The fastening according to claim 1, characterized in that the washer for pressing the terminal is made curved with a radius of curvature within 1/160 - 1/280.  3. The bond according to claim 1, characterized in that the washer for pressing the terminal is made of polyurethane.  4. The bond according to claim 1, characterized in that the ratio of the lengths of any two adjacent in terms of the sides of the terminal is from 0.60 to 1.75.  5. The fastening according to claim 1, characterized in that the terminal is made in the form of a trapezoid in plan, wherein one of the protrusions for pressing the rail sole is made on the smaller side.

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